IMPACT MIRACLE REVOLUTION
For Machining of Hardened Steels
![IMPACT MIRACLE REVOLUTION](https://data.mmc-carbide.com/3716/7955/0121/vfr_main_02.png)
Revolutionary Machining of Hardened Steels
New coating provides outstanding tool life
IMPACT MIRACLE REVOLUTION Coating
The combination of the newly developed (Al, Cr, Si) N coating with improved lubricity and a high oxidisation temperature, together with the (Al, Ti, Si) N coating layer that displays excellent wear and adhesion to other coating layers, enables efficient and reliable machining of hardened steels.
![IMPACT MIRACLE REVOLUTION Coating](https://data.mmc-carbide.com/5816/5823/0326/vfr_02_en-gl.png)
Due to manufacturing adjustments, differences in the color of the coating for different diameters may occur. This has no adverse effect on performance.
Selection According to Work Material Hardness
![](https://data.mmc-carbide.com/2416/5823/0329/vfr_03-2_en-gl.png)
Ball nose, Medium cut length, 4-Flute
VFR4MB
Higher efficiencies from increased feed rates when finish machining.
Shorter machining times while maintaining good surface finishes.
![](https://data.mmc-carbide.com/8916/7946/3992/vfr_18_en-gl.png)
Correct Use of 2- and 4-Flute Geometries
2-flute geometries usually have a larger chip pocket and are better for rough machining with greater depths of cut that produce a larger volume of chips.
4-flute geometries can increase efficiency and reduce wear when used for finishing at small depths of cut. Additionally, using a 4-flute geometry is advantageous when machining harder materials at reduced depths of cut.
![](https://data.mmc-carbide.com/3616/7946/4010/vfr_19_en-gl.png)
Cutting Performance
Comparison of Wear Resistance Surface - Machining HAP72 (69HRC)
IMPACT MIRACLE REVOLUTION end mills demonstrate excellent wear resistance even when machining high hardness workpiece materials.
![](https://data.mmc-carbide.com/7216/7946/4072/vfr_20_en-gl.png)
Application Example
High efficiency and high precision finishing of press mould parts (60HRC)
Issues from Customer1. Issue with machining efficiency due to the curvature of the workpiece material so a corner radius end mill cannot be used. 2. A 4-flute type was used to machine, but at the tip, the chip discharge was poor and resulted in a torn surface finish. The tool was changed to a 2-flute type. 3. The 2-flute type showed excessive wear after a long cut length and necessitated a tool change because the surface finish accuracy could not be maintained. |
![](https://data.mmc-carbide.com/3216/7946/4090/vfr_21_en-gl.png)
Comments from Customer Evaluation· VFR4MB showed almost no wear and no change in surface roughness even though the tip was overworked on the contours of a press mould. · By making it possible to machine with a single end mill, the costs were reduced and the time problems which required a tool change every 2 hours of machining or more were resolved. In addition, the feed rate could be increased by 1.5 which shortened the machining time. |
Precision-Corner Radius End Mill, 4 Flute
VFRPSRB
A seamless edge geometry that is resistant to chipping, together with a wiper edge and strong back taper enables high precision machining.
![Precision-Corner Radius End Mill, 4 Flute
VFRPSRB](https://data.mmc-carbide.com/4816/5823/0358/vfr_14_en-gl.png)
High-Precision Corner Radius Accuracy
The corner radius of VFRPSRB is measured as follows, based on the absolute centre of the corner radius.
![](https://data.mmc-carbide.com/5616/5823/0361/vfr_15_en-gl.png)
Completely Seamless Curved R Edge, DC≥1.5mm
A stable machined surface is achieved by a seamless blend between the radius and flank geometry.
![](https://data.mmc-carbide.com/1916/5823/0363/vfr_16_en-gl.png)
Equipped with a Wiper Edge, DC≥1.5mm
A smooth surface finish is possible by installing a wiper edge.
![](https://data.mmc-carbide.com/7716/5823/0365/vfr_17_en-gl.png)
Ball nose, 2 Flute, Long neck
VFR2XLB
Precise machining of vertical walls is possible due to a back taper and a strong, seamless ball nose cutting edge geometry.
![Ball nose, 2 Flute, Long neck
VFR2XLB](https://data.mmc-carbide.com/1616/5823/0352/vfr_12_en-gl.png)
Machining of a Bevel Gear Mould
Ideal for machining high-hardness precision, cold forging moulds of 65HRC or higher.
![](https://data.mmc-carbide.com/6716/5823/0355/vfr_13-2_en-gl.png)
Revolutionary Hardened Steel
VFR2SSB / VFR2SB
2 Flute Ball Nose End Mill
![Revolutionary Hardened Steel
VFR2SSB / VFR2SB](https://data.mmc-carbide.com/5916/5823/0331/vfr_04_en-gl.png)
New Cutting Edge Shape: Optimization of the cutting edge curve, helix angle, and rake angle have improved the edge strength at all areas of the ball blades.
Carbide Substrate: High-grade material types ideal for high-hardness materials.
Cutting Example
![](https://data.mmc-carbide.com/7516/5823/0337/vfr_06-2_en-gl.png)
Cutting Performance
AISI H13 (52HRC)
![](https://data.mmc-carbide.com/6816/5823/0345/vfr_10_en-gl.png)
VFR2SBF
2 Flute Ball Nose End Mill for Mirror Finish Cutting
![VFR2SBF
2 Flute Ball Nose End Mill for Mirror Finish Cutting](https://data.mmc-carbide.com/4616/5823/0334/vfr_05_en-gl.png)
Application Example
Workpiece : Pre-hardened Steel
![](https://data.mmc-carbide.com/1516/5823/0341/vfr_08-2_en-gl.png)
![](https://data.mmc-carbide.com/9316/5823/0343/vfr_09_en-gl.png)
AISI H13 (52 HRC) Comparison of Machined Surface
![](https://data.mmc-carbide.com/4716/5823/0348/vfr_11_en-gl.png)
Technical consultation from here
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